Wasp & Hornet Spray can be used both indoors (Attics and other places where nests are built) or outdoors, to control wasps and hornets in such areas as: walls, chimneys, telephone/electric poles, trees, shrubs, decks, outdoor lighting, schools, farms, garages, and wooden playground equipment. Use under eaves, screens, window frames, doors, patios, cracks, holes, crevices in foundation, at outside faucets, along window sills and ledges, or wherever insects are noticed.